the shots with the 50 1.8 especially at high iso and at 1.8 remind me why I don`t really enjoy this lens at times. Mine produces similar results.
It seems to have focusing inconsistencies. Front or back focuses with varying distances.
I can see that the next purchase will be the 50 1.4 or Sigma 30 1.4

I've been to the last two 24 hour races but not with media access, which so far is making all the difference. Otherwise you just end up with 200 shots of cars driving past from a couple of different viewpoints!

Ian and I will be meeting up during the event and we've both rented 70-200mm f2.8 lenses which should help at night. My 70-300 is handy during the day but won't cut it at night on darker areas of the track.

I'm not going to bore you all with too many more from the weekend. Here are a few of the several thousand frames I shot.

I'm really pleased with this sunset shot. I identified that it would be a good opportunity well before the event and noted the times on my planning spreadsheet. When I visited the circuit the day before I clocked where the sun when down and then worked out the best location on the circuit map. It was the furthest point from the media centre and a bit of a hike out there to get it but the shot has worked pretty well
IMG_7767 by ianganderton, on Flickr

This is probably my personal favorite from the weekend. The cloud of dust is carbon from the brakes being released as the wheel nuts are undone
IMG_8666 by ianganderton, on Flickr

The next two are of sunrise. Again I'd planned for sunrise and managed to find a perfect location to shoot from. I've already posted one but cant decide which of the 3 I prefer. Phil liked the one directly below. I like the porsche in the first one I posted but also like the way the white car 2 below shows better in the light. I'd appriciate any feedback on this
IMG_9176 by ianganderton, on Flickr

While I dont think this is a toptastic image in its own right it is pretty good of a journalistic moment. Not many could have got this shot, I was one of the few who planned for it and made sure I'd baggsied the right place to get it in time
IMG_9517 by ianganderton, on Flickr